/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:36:52,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:36:52,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:36:52,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:36:52,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:36:52,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:36:52,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:36:52,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:36:52,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:36:52,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:36:52,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:36:52,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:36:52,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:36:52,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:36:52,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:36:52,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:36:52,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:36:52,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:36:52,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:36:52,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:36:52,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:36:52,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:36:52,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:36:52,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:36:52,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:36:52,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:36:52,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:36:52,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:36:52,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:36:52,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:36:52,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:36:52,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:36:52,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:36:52,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:36:52,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:36:52,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:36:52,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:36:52,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:36:52,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:36:52,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:36:52,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:36:52,665 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:36:52,692 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:36:52,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:36:52,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:36:52,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:36:52,695 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:36:52,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:36:52,695 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:36:52,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:36:52,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:36:52,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:36:52,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:36:52,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:36:52,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:36:52,697 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:36:52,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:36:52,697 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:36:52,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:36:52,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:36:52,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:36:52,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:36:52,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:36:52,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:36:52,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:36:52,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:36:52,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:36:52,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:36:52,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:36:52,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:36:52,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:36:52,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:36:53,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:36:53,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:36:53,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:36:53,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:36:53,180 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:36:53,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 18:36:53,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/359083de5/546c848f7836460a94042fa146736966/FLAGee183ea2e [2020-10-28 18:36:53,977 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:36:53,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 18:36:53,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/359083de5/546c848f7836460a94042fa146736966/FLAGee183ea2e [2020-10-28 18:36:54,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/359083de5/546c848f7836460a94042fa146736966 [2020-10-28 18:36:54,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:36:54,285 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:36:54,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:36:54,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:36:54,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:36:54,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:36:54" (1/1) ... [2020-10-28 18:36:54,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478994f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:54, skipping insertion in model container [2020-10-28 18:36:54,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:36:54" (1/1) ... [2020-10-28 18:36:54,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:36:54,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:36:54,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:36:54,657 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:36:54,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:36:54,761 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:36:54,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:54 WrapperNode [2020-10-28 18:36:54,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:36:54,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:36:54,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:36:54,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:36:54,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:54" (1/1) ... [2020-10-28 18:36:54,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:54" (1/1) ... [2020-10-28 18:36:54,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:54" (1/1) ... [2020-10-28 18:36:54,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:54" (1/1) ... [2020-10-28 18:36:54,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:54" (1/1) ... [2020-10-28 18:36:54,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:54" (1/1) ... [2020-10-28 18:36:54,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:54" (1/1) ... [2020-10-28 18:36:54,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:36:54,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:36:54,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:36:54,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:36:54,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:36:54,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:36:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:36:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:36:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:36:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:36:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:36:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:36:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:36:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:36:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:36:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:36:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:36:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:36:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:36:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:36:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:36:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:36:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:36:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:36:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:36:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:36:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:36:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:36:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:36:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:36:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:36:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:36:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:36:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:36:55,915 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:36:55,916 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:36:55,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:36:55 BoogieIcfgContainer [2020-10-28 18:36:55,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:36:55,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:36:55,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:36:55,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:36:55,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:36:54" (1/3) ... [2020-10-28 18:36:55,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d4217d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:36:55, skipping insertion in model container [2020-10-28 18:36:55,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:36:54" (2/3) ... [2020-10-28 18:36:55,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d4217d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:36:55, skipping insertion in model container [2020-10-28 18:36:55,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:36:55" (3/3) ... [2020-10-28 18:36:55,927 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 18:36:55,941 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:36:55,946 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:36:55,960 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:36:55,989 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:36:55,990 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:36:55,990 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:36:55,990 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:36:55,990 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:36:55,990 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:36:55,991 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:36:55,991 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:36:56,011 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2020-10-28 18:36:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:36:56,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:36:56,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:36:56,022 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:36:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:36:56,029 INFO L82 PathProgramCache]: Analyzing trace with hash -593336161, now seen corresponding path program 1 times [2020-10-28 18:36:56,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:36:56,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451567011] [2020-10-28 18:36:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:36:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:36:56,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:56,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:56,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:57,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:57,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:36:58,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:01,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:01,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:37:01,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:37:01,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:37:01,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:01,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:01,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:37:01,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 18:37:01,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:37:01,930 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:01,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:01,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:01,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:01,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:01,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:01,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:37:01,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:01,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:01,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:37:01,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:01,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:37:01,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:37:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:02,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451567011] [2020-10-28 18:37:02,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:02,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:37:02,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015626599] [2020-10-28 18:37:02,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:37:02,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:02,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:37:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:37:02,036 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 4 states. [2020-10-28 18:37:02,628 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:37:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:03,331 INFO L93 Difference]: Finished difference Result 228 states and 365 transitions. [2020-10-28 18:37:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:37:03,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-28 18:37:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:03,345 INFO L225 Difference]: With dead ends: 228 [2020-10-28 18:37:03,345 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 18:37:03,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:37:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 18:37:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2020-10-28 18:37:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 18:37:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-10-28 18:37:03,415 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 64 [2020-10-28 18:37:03,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:03,416 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-10-28 18:37:03,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:37:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-10-28 18:37:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:37:03,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:03,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:03,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:37:03,420 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:03,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:03,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1430129785, now seen corresponding path program 1 times [2020-10-28 18:37:03,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:03,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653917213] [2020-10-28 18:37:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:03,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:03,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:03,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:03,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:04,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:07,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:07,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:37:07,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:37:07,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3888 [2020-10-28 18:37:07,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:07,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:07,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:07,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:37:07,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 18:37:07,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:37:07,663 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:07,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:07,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:07,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:07,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:07,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:07,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:37:07,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:07,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:37:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:37:07,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:37:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:07,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653917213] [2020-10-28 18:37:07,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:07,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:37:07,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822099590] [2020-10-28 18:37:07,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:37:07,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:07,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:37:07,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:37:07,731 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 4 states. [2020-10-28 18:37:08,030 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:37:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:08,708 INFO L93 Difference]: Finished difference Result 355 states and 540 transitions. [2020-10-28 18:37:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:37:08,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-28 18:37:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:08,719 INFO L225 Difference]: With dead ends: 355 [2020-10-28 18:37:08,720 INFO L226 Difference]: Without dead ends: 244 [2020-10-28 18:37:08,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:37:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-28 18:37:08,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2020-10-28 18:37:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-28 18:37:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 360 transitions. [2020-10-28 18:37:08,795 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 360 transitions. Word has length 65 [2020-10-28 18:37:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:08,796 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 360 transitions. [2020-10-28 18:37:08,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:37:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 360 transitions. [2020-10-28 18:37:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:37:08,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:08,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:08,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:37:08,802 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:08,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1115930669, now seen corresponding path program 1 times [2020-10-28 18:37:08,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:08,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100781802] [2020-10-28 18:37:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:08,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:08,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:08,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:08,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:10,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:13,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:13,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:37:13,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:37:13,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:37:13,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:13,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:13,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:13,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:37:13,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 18:37:13,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:14,168 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:14,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:14,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:14,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:14,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:14,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:14,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:37:14,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:14,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:14,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:37:14,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:14,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:37:14,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:14,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100781802] [2020-10-28 18:37:14,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:14,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:37:14,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523453656] [2020-10-28 18:37:14,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:37:14,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:14,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:37:14,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:37:14,213 INFO L87 Difference]: Start difference. First operand 241 states and 360 transitions. Second operand 4 states. [2020-10-28 18:37:14,520 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:37:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:15,097 INFO L93 Difference]: Finished difference Result 615 states and 952 transitions. [2020-10-28 18:37:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:37:15,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 18:37:15,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:15,101 INFO L225 Difference]: With dead ends: 615 [2020-10-28 18:37:15,101 INFO L226 Difference]: Without dead ends: 412 [2020-10-28 18:37:15,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:37:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-28 18:37:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 409. [2020-10-28 18:37:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-28 18:37:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 624 transitions. [2020-10-28 18:37:15,161 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 624 transitions. Word has length 66 [2020-10-28 18:37:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:15,162 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 624 transitions. [2020-10-28 18:37:15,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:37:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 624 transitions. [2020-10-28 18:37:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:37:15,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:15,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:15,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:37:15,171 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:15,172 INFO L82 PathProgramCache]: Analyzing trace with hash -629612001, now seen corresponding path program 1 times [2020-10-28 18:37:15,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:15,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329610461] [2020-10-28 18:37:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:15,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:15,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:15,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:15,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:18,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:18,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:37:18,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:37:18,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2946 [2020-10-28 18:37:18,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:18,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:18,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:18,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 18:37:18,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 18:37:18,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:37:18,413 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:18,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:18,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:18,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:18,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:18,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:18,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:37:18,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:18,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:18,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:37:18,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:18,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:37:18,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:37:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:18,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329610461] [2020-10-28 18:37:18,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:18,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:37:18,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362317256] [2020-10-28 18:37:18,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:37:18,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:18,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:37:18,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:37:18,463 INFO L87 Difference]: Start difference. First operand 409 states and 624 transitions. Second operand 4 states. [2020-10-28 18:37:18,731 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:37:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:19,339 INFO L93 Difference]: Finished difference Result 1087 states and 1692 transitions. [2020-10-28 18:37:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:37:19,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 18:37:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:19,344 INFO L225 Difference]: With dead ends: 1087 [2020-10-28 18:37:19,345 INFO L226 Difference]: Without dead ends: 716 [2020-10-28 18:37:19,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:37:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-28 18:37:19,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 713. [2020-10-28 18:37:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-28 18:37:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1096 transitions. [2020-10-28 18:37:19,396 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1096 transitions. Word has length 67 [2020-10-28 18:37:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:19,397 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1096 transitions. [2020-10-28 18:37:19,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:37:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1096 transitions. [2020-10-28 18:37:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:37:19,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:19,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:19,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:37:19,399 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash -392431237, now seen corresponding path program 1 times [2020-10-28 18:37:19,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:19,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182758012] [2020-10-28 18:37:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:19,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:19,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:19,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:19,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:24,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:24,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:37:24,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:37:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:37:24,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:24,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:37:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 18:37:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:24,746 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:24,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:24,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:24,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:24,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:24,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:24,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:37:24,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:24,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:24,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:37:24,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:24,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:37:24,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:24,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182758012] [2020-10-28 18:37:24,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:24,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:37:24,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416763560] [2020-10-28 18:37:24,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:37:24,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:24,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:37:24,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:37:24,797 INFO L87 Difference]: Start difference. First operand 713 states and 1096 transitions. Second operand 4 states. [2020-10-28 18:37:25,060 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:37:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:25,628 INFO L93 Difference]: Finished difference Result 1935 states and 3004 transitions. [2020-10-28 18:37:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:37:25,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:37:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:25,638 INFO L225 Difference]: With dead ends: 1935 [2020-10-28 18:37:25,639 INFO L226 Difference]: Without dead ends: 1260 [2020-10-28 18:37:25,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:37:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2020-10-28 18:37:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1257. [2020-10-28 18:37:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1257 states. [2020-10-28 18:37:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1928 transitions. [2020-10-28 18:37:25,731 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1928 transitions. Word has length 68 [2020-10-28 18:37:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:25,732 INFO L481 AbstractCegarLoop]: Abstraction has 1257 states and 1928 transitions. [2020-10-28 18:37:25,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:37:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1928 transitions. [2020-10-28 18:37:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:37:25,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:25,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:25,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:37:25,737 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:25,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1595047153, now seen corresponding path program 1 times [2020-10-28 18:37:25,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:25,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660855831] [2020-10-28 18:37:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:25,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:25,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:26,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:26,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:29,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:29,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:37:29,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:37:29,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3482 [2020-10-28 18:37:29,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:29,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:29,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:37:29,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:37:29,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 18:37:29,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:29,638 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:29,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:29,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:29,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:29,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:29,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:29,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 18:37:29,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:29,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:37:29,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:37:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:29,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660855831] [2020-10-28 18:37:29,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:29,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:37:29,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103534427] [2020-10-28 18:37:29,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:37:29,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:29,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:37:29,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:37:29,733 INFO L87 Difference]: Start difference. First operand 1257 states and 1928 transitions. Second operand 6 states. [2020-10-28 18:37:30,036 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:37:30,766 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:37:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:30,928 INFO L93 Difference]: Finished difference Result 3679 states and 5676 transitions. [2020-10-28 18:37:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:37:30,929 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 18:37:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:30,942 INFO L225 Difference]: With dead ends: 3679 [2020-10-28 18:37:30,942 INFO L226 Difference]: Without dead ends: 2460 [2020-10-28 18:37:30,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:37:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2020-10-28 18:37:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2457. [2020-10-28 18:37:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2457 states. [2020-10-28 18:37:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3768 transitions. [2020-10-28 18:37:31,153 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3768 transitions. Word has length 69 [2020-10-28 18:37:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:31,155 INFO L481 AbstractCegarLoop]: Abstraction has 2457 states and 3768 transitions. [2020-10-28 18:37:31,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:37:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3768 transitions. [2020-10-28 18:37:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:37:31,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:31,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:31,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:37:31,157 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:31,158 INFO L82 PathProgramCache]: Analyzing trace with hash 326675478, now seen corresponding path program 1 times [2020-10-28 18:37:31,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:31,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927811162] [2020-10-28 18:37:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:31,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:31,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:31,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:31,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:37:31,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:37:31,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-28 18:37:31,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:31,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:37:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:37:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 18:37:31,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:32,298 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:32,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:32,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:32,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:32,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:32,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:32,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:37:32,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:32,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:32,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:37:32,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:32,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:37:32,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:32,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927811162] [2020-10-28 18:37:32,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:32,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:37:32,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832635932] [2020-10-28 18:37:32,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:37:32,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:32,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:37:32,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:37:32,348 INFO L87 Difference]: Start difference. First operand 2457 states and 3768 transitions. Second operand 8 states. [2020-10-28 18:37:32,699 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-28 18:37:33,765 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:37:34,080 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:37:34,392 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:37:34,694 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:37:35,082 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:37:35,364 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:37:35,644 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:37:35,924 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:37:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:37,151 INFO L93 Difference]: Finished difference Result 26647 states and 41068 transitions. [2020-10-28 18:37:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 18:37:37,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 18:37:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:37,322 INFO L225 Difference]: With dead ends: 26647 [2020-10-28 18:37:37,322 INFO L226 Difference]: Without dead ends: 24228 [2020-10-28 18:37:37,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-28 18:37:37,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24228 states. [2020-10-28 18:37:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24228 to 4873. [2020-10-28 18:37:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4873 states. [2020-10-28 18:37:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 7368 transitions. [2020-10-28 18:37:38,087 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 7368 transitions. Word has length 69 [2020-10-28 18:37:38,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:38,087 INFO L481 AbstractCegarLoop]: Abstraction has 4873 states and 7368 transitions. [2020-10-28 18:37:38,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:37:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 7368 transitions. [2020-10-28 18:37:38,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:37:38,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:38,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:38,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:37:38,089 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:38,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1522086597, now seen corresponding path program 1 times [2020-10-28 18:37:38,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:38,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119079047] [2020-10-28 18:37:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:38,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:38,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:38,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:38,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:38,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:38,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:37:38,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:37:38,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 774 [2020-10-28 18:37:38,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:38,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:38,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:38,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:37:38,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 18:37:38,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:39,212 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:39,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:39,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:39,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:39,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:39,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:39,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:37:39,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:39,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:39,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:37:39,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:39,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:37:39,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:39,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119079047] [2020-10-28 18:37:39,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:39,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:37:39,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688435553] [2020-10-28 18:37:39,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:37:39,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:39,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:37:39,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:37:39,263 INFO L87 Difference]: Start difference. First operand 4873 states and 7368 transitions. Second operand 4 states. [2020-10-28 18:37:39,543 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:37:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:40,615 INFO L93 Difference]: Finished difference Result 12033 states and 18206 transitions. [2020-10-28 18:37:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:37:40,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 18:37:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:40,635 INFO L225 Difference]: With dead ends: 12033 [2020-10-28 18:37:40,635 INFO L226 Difference]: Without dead ends: 7198 [2020-10-28 18:37:40,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:37:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7198 states. [2020-10-28 18:37:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7198 to 7195. [2020-10-28 18:37:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7195 states. [2020-10-28 18:37:41,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 10778 transitions. [2020-10-28 18:37:41,415 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 10778 transitions. Word has length 71 [2020-10-28 18:37:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:41,416 INFO L481 AbstractCegarLoop]: Abstraction has 7195 states and 10778 transitions. [2020-10-28 18:37:41,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:37:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 10778 transitions. [2020-10-28 18:37:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:37:41,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:41,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:41,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:37:41,417 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash -900556964, now seen corresponding path program 1 times [2020-10-28 18:37:41,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:41,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065390930] [2020-10-28 18:37:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:41,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:42,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:42,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:37:42,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:37:42,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 747 [2020-10-28 18:37:42,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:42,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:42,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:37:42,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:37:42,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 18:37:42,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:42,682 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:42,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:42,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:42,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:42,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:42,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:42,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:37:42,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:42,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:37:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:37:42,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:42,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065390930] [2020-10-28 18:37:42,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:42,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:37:42,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916559217] [2020-10-28 18:37:42,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:37:42,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:42,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:37:42,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:37:42,749 INFO L87 Difference]: Start difference. First operand 7195 states and 10778 transitions. Second operand 8 states. [2020-10-28 18:37:43,203 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-28 18:37:44,462 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:37:44,812 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-28 18:37:45,146 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:37:45,461 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:37:45,864 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:37:46,210 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:37:46,569 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 18:37:46,910 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:37:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:48,676 INFO L93 Difference]: Finished difference Result 40665 states and 61070 transitions. [2020-10-28 18:37:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 18:37:48,676 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-28 18:37:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:48,768 INFO L225 Difference]: With dead ends: 40665 [2020-10-28 18:37:48,768 INFO L226 Difference]: Without dead ends: 33510 [2020-10-28 18:37:48,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-28 18:37:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33510 states. [2020-10-28 18:37:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33510 to 7195. [2020-10-28 18:37:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7195 states. [2020-10-28 18:37:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 10682 transitions. [2020-10-28 18:37:49,892 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 10682 transitions. Word has length 71 [2020-10-28 18:37:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:49,892 INFO L481 AbstractCegarLoop]: Abstraction has 7195 states and 10682 transitions. [2020-10-28 18:37:49,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:37:49,893 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 10682 transitions. [2020-10-28 18:37:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:37:49,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:49,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:49,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:37:49,894 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2088144342, now seen corresponding path program 1 times [2020-10-28 18:37:49,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:49,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407547130] [2020-10-28 18:37:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:49,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:50,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:50,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:50,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:37:50,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:37:50,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-28 18:37:50,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:50,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:37:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:37:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:37:50,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:50,858 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:50,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:50,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:50,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:50,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:50,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:50,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 18:37:50,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:50,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:37:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:37:50,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:50,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407547130] [2020-10-28 18:37:50,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:50,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:37:50,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114523191] [2020-10-28 18:37:50,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:37:50,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:50,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:37:50,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:37:50,923 INFO L87 Difference]: Start difference. First operand 7195 states and 10682 transitions. Second operand 6 states. [2020-10-28 18:37:51,228 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:37:52,122 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:37:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:53,131 INFO L93 Difference]: Finished difference Result 21409 states and 31774 transitions. [2020-10-28 18:37:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:37:53,132 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-28 18:37:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:53,168 INFO L225 Difference]: With dead ends: 21409 [2020-10-28 18:37:53,168 INFO L226 Difference]: Without dead ends: 14254 [2020-10-28 18:37:53,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:37:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14254 states. [2020-10-28 18:37:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14254 to 14251. [2020-10-28 18:37:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14251 states. [2020-10-28 18:37:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14251 states to 14251 states and 21034 transitions. [2020-10-28 18:37:54,509 INFO L78 Accepts]: Start accepts. Automaton has 14251 states and 21034 transitions. Word has length 72 [2020-10-28 18:37:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:54,510 INFO L481 AbstractCegarLoop]: Abstraction has 14251 states and 21034 transitions. [2020-10-28 18:37:54,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:37:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 14251 states and 21034 transitions. [2020-10-28 18:37:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:37:54,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:54,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:54,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:37:54,511 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:54,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:54,511 INFO L82 PathProgramCache]: Analyzing trace with hash -85794095, now seen corresponding path program 1 times [2020-10-28 18:37:54,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:54,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411884900] [2020-10-28 18:37:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:54,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:54,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:54,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:37:54,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:54,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-28 18:37:54,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:54,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:54,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:37:54,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 18:37:54,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:37:54,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:37:55,010 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:37:55,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:37:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:55,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:55,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:37:55,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:37:55,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:37:55,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:37:55,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:37:55,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:37:55,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:37:55,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:37:55,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:37:55,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:37:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:37:55,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411884900] [2020-10-28 18:37:55,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:37:55,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:37:55,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443582094] [2020-10-28 18:37:55,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:37:55,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:37:55,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:37:55,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:37:55,052 INFO L87 Difference]: Start difference. First operand 14251 states and 21034 transitions. Second operand 5 states. [2020-10-28 18:37:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:37:57,633 INFO L93 Difference]: Finished difference Result 25690 states and 37720 transitions. [2020-10-28 18:37:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:37:57,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-28 18:37:57,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:37:57,694 INFO L225 Difference]: With dead ends: 25690 [2020-10-28 18:37:57,694 INFO L226 Difference]: Without dead ends: 25687 [2020-10-28 18:37:57,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:37:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25687 states. [2020-10-28 18:37:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25687 to 14763. [2020-10-28 18:37:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14763 states. [2020-10-28 18:37:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14763 states to 14763 states and 21482 transitions. [2020-10-28 18:37:59,517 INFO L78 Accepts]: Start accepts. Automaton has 14763 states and 21482 transitions. Word has length 72 [2020-10-28 18:37:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:37:59,517 INFO L481 AbstractCegarLoop]: Abstraction has 14763 states and 21482 transitions. [2020-10-28 18:37:59,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:37:59,517 INFO L276 IsEmpty]: Start isEmpty. Operand 14763 states and 21482 transitions. [2020-10-28 18:37:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:37:59,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:37:59,531 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:37:59,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:37:59,532 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:37:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:37:59,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2132641618, now seen corresponding path program 1 times [2020-10-28 18:37:59,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:37:59,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721242930] [2020-10-28 18:37:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:37:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:37:59,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:59,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:59,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:37:59,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:00,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:00,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:01,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:01,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:03,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:03,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:04,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:04,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:38:04,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:38:04,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 18:38:04,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:04,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:04,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:38:04,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:38:04,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:38:04,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:38:04,915 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:38:04,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:04,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:04,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:04,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:04,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:04,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:38:04,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:04,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:04,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:04,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:04,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:04,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:38:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721242930] [2020-10-28 18:38:04,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:38:04,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:38:04,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294956718] [2020-10-28 18:38:04,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:38:04,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:04,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:38:04,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:38:04,965 INFO L87 Difference]: Start difference. First operand 14763 states and 21482 transitions. Second operand 6 states. [2020-10-28 18:38:05,278 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:38:06,314 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:38:06,682 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:38:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:08,768 INFO L93 Difference]: Finished difference Result 41012 states and 60088 transitions. [2020-10-28 18:38:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:38:08,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-28 18:38:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:08,817 INFO L225 Difference]: With dead ends: 41012 [2020-10-28 18:38:08,817 INFO L226 Difference]: Without dead ends: 26289 [2020-10-28 18:38:08,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:38:08,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26289 states. [2020-10-28 18:38:11,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26289 to 26251. [2020-10-28 18:38:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26251 states. [2020-10-28 18:38:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26251 states to 26251 states and 38282 transitions. [2020-10-28 18:38:11,875 INFO L78 Accepts]: Start accepts. Automaton has 26251 states and 38282 transitions. Word has length 98 [2020-10-28 18:38:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:11,875 INFO L481 AbstractCegarLoop]: Abstraction has 26251 states and 38282 transitions. [2020-10-28 18:38:11,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:38:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 26251 states and 38282 transitions. [2020-10-28 18:38:11,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:38:11,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:11,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:11,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:38:11,882 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:11,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1362963508, now seen corresponding path program 1 times [2020-10-28 18:38:11,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:11,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945903031] [2020-10-28 18:38:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:11,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:11,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:12,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:12,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:12,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:16,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:16,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:38:16,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:38:16,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:38:16,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:16,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:16,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:38:16,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:38:16,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:38:16,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:17,234 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:38:17,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:17,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:17,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:17,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:17,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:17,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:38:17,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:17,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:17,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:17,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:17,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:17,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 18:38:17,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945903031] [2020-10-28 18:38:17,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:38:17,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:38:17,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757463405] [2020-10-28 18:38:17,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:38:17,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:17,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:38:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:38:17,288 INFO L87 Difference]: Start difference. First operand 26251 states and 38282 transitions. Second operand 8 states. [2020-10-28 18:38:17,630 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:38:18,950 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:38:19,245 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:38:19,527 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:38:20,034 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:38:20,365 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:38:20,660 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:38:20,958 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:38:31,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:38:31,420 INFO L93 Difference]: Finished difference Result 147852 states and 215642 transitions. [2020-10-28 18:38:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:38:31,421 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-28 18:38:31,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:38:31,671 INFO L225 Difference]: With dead ends: 147852 [2020-10-28 18:38:31,671 INFO L226 Difference]: Without dead ends: 121641 [2020-10-28 18:38:31,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:38:31,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121641 states. [2020-10-28 18:38:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121641 to 46027. [2020-10-28 18:38:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46027 states. [2020-10-28 18:38:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46027 states to 46027 states and 67018 transitions. [2020-10-28 18:38:37,472 INFO L78 Accepts]: Start accepts. Automaton has 46027 states and 67018 transitions. Word has length 98 [2020-10-28 18:38:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:38:37,473 INFO L481 AbstractCegarLoop]: Abstraction has 46027 states and 67018 transitions. [2020-10-28 18:38:37,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:38:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 46027 states and 67018 transitions. [2020-10-28 18:38:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:38:37,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:38:37,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:38:37,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:38:37,480 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:38:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:38:37,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1485057082, now seen corresponding path program 1 times [2020-10-28 18:38:37,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:38:37,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525663169] [2020-10-28 18:38:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:38:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:37,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:37,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:37,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:37,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:38,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:38,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:42,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:42,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:42,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:38:42,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:38:42,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:38:42,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:42,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:42,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:38:42,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:38:42,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:38:42,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:42,834 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:38:42,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:38:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:38:42,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:38:42,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:38:42,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:38:42,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:38:42,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:38:42,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:38:42,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:38:42,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:38:42,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:38:42,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:38:42,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:38:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 18:38:42,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525663169] [2020-10-28 18:38:42,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:38:42,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:38:42,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018364068] [2020-10-28 18:38:42,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:38:42,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:38:42,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:38:42,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:38:42,881 INFO L87 Difference]: Start difference. First operand 46027 states and 67018 transitions. Second operand 8 states. [2020-10-28 18:38:43,226 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:38:44,514 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:38:44,819 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:38:45,252 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:38:45,566 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:38:45,853 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:38:46,169 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:38:46,480 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:39:00,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:00,728 INFO L93 Difference]: Finished difference Result 175278 states and 255092 transitions. [2020-10-28 18:39:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:39:00,729 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-28 18:39:00,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:01,131 INFO L225 Difference]: With dead ends: 175278 [2020-10-28 18:39:01,131 INFO L226 Difference]: Without dead ends: 149067 [2020-10-28 18:39:01,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:39:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149067 states. [2020-10-28 18:39:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149067 to 73195. [2020-10-28 18:39:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73195 states. [2020-10-28 18:39:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73195 states to 73195 states and 106218 transitions. [2020-10-28 18:39:10,056 INFO L78 Accepts]: Start accepts. Automaton has 73195 states and 106218 transitions. Word has length 98 [2020-10-28 18:39:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:10,056 INFO L481 AbstractCegarLoop]: Abstraction has 73195 states and 106218 transitions. [2020-10-28 18:39:10,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:39:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 73195 states and 106218 transitions. [2020-10-28 18:39:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:39:10,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:10,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:39:10,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:39:10,065 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash 748955200, now seen corresponding path program 1 times [2020-10-28 18:39:10,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:10,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345440955] [2020-10-28 18:39:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:10,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:10,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:10,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:10,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:10,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:10,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:12,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:15,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:15,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:39:15,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:39:15,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-28 18:39:15,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:15,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:39:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:39:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:39:15,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:15,502 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:39:15,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:15,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:15,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:15,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:15,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:15,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:39:15,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:15,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:15,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:39:15,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:15,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:39:15,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 18:39:15,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345440955] [2020-10-28 18:39:15,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:39:15,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:39:15,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124953435] [2020-10-28 18:39:15,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:39:15,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:15,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:39:15,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:39:15,546 INFO L87 Difference]: Start difference. First operand 73195 states and 106218 transitions. Second operand 8 states. [2020-10-28 18:39:15,903 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:39:17,274 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:39:17,719 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:39:18,116 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:39:18,405 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:39:18,719 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:39:18,994 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:39:19,286 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:39:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:39:36,783 INFO L93 Difference]: Finished difference Result 195948 states and 285018 transitions. [2020-10-28 18:39:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:39:36,783 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-28 18:39:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:39:37,081 INFO L225 Difference]: With dead ends: 195948 [2020-10-28 18:39:37,081 INFO L226 Difference]: Without dead ends: 169737 [2020-10-28 18:39:37,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:39:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169737 states. [2020-10-28 18:39:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169737 to 92971. [2020-10-28 18:39:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92971 states. [2020-10-28 18:39:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92971 states to 92971 states and 134954 transitions. [2020-10-28 18:39:48,442 INFO L78 Accepts]: Start accepts. Automaton has 92971 states and 134954 transitions. Word has length 98 [2020-10-28 18:39:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:39:48,443 INFO L481 AbstractCegarLoop]: Abstraction has 92971 states and 134954 transitions. [2020-10-28 18:39:48,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:39:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 92971 states and 134954 transitions. [2020-10-28 18:39:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 18:39:48,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:39:48,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:39:48,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:39:48,451 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:39:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:39:48,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2085554374, now seen corresponding path program 1 times [2020-10-28 18:39:48,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:39:48,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324947830] [2020-10-28 18:39:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:39:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:48,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:48,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:48,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:48,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:48,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:48,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:50,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:53,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:53,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 18:39:53,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:39:53,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:39:53,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:53,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:39:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:39:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 18:39:53,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:53,805 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:39:53,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:39:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:39:53,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:39:53,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:39:53,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:39:53,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:39:53,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:39:53,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:39:53,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:39:53,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:39:53,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:39:53,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:39:53,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:39:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 18:39:53,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324947830] [2020-10-28 18:39:53,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:39:53,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 18:39:53,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771680965] [2020-10-28 18:39:53,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:39:53,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:39:53,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:39:53,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:39:53,858 INFO L87 Difference]: Start difference. First operand 92971 states and 134954 transitions. Second operand 8 states. [2020-10-28 18:39:54,212 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 18:39:55,771 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:39:56,095 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:39:56,401 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:39:56,708 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-28 18:39:57,005 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:39:57,311 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:39:57,576 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:40:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:40:18,039 INFO L93 Difference]: Finished difference Result 217140 states and 315698 transitions. [2020-10-28 18:40:18,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 18:40:18,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-28 18:40:18,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:40:18,457 INFO L225 Difference]: With dead ends: 217140 [2020-10-28 18:40:18,458 INFO L226 Difference]: Without dead ends: 190929 [2020-10-28 18:40:18,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 18:40:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190929 states.